Combination

3 clues
Mixture
Type of lock
Waitress: "In other words, the One-Two ___. Comin' right up.
Similar answers:
Abomination
Acrossthenation
Adestination
Africannation
Africannations
Aggressornation
Alienation
Aliennation
Alternation
Anation
Anexaminationof
Antagoniststagnation
Antinationalist
Arenations
Assassination
Assignation
Augustanational
Backexamination
Balkannation
Barexaminations